The interacting-string picture i~ extended to the NeveuSchwarz and Ramond models. The picture is manifestly dual, even for the Ramond model, and amplitudes with an arbitrary number of external fermions can be constructed. In all channels the only singularities are poles corresponding to the expected particles. There exist both qq and zero-quark mesons, which differ in the parity of the states with odd Neveu-Schwarz g-parity. Calculations of ff scattering amplitudes are performed. The results are B-functions multiplied by simple kinematical factors, and it is easily verified that the amplitudes possess all the necessary properties.

This paper investigates the excitation of magnetostatic surface waves in the multilayered structure consisting of a ferrimagnetic film sandwiched between two metal-backed dielectrics. The analysis takes into account the effect of finite width of the ferrimagnetic film. Numerical results have been presented for a wide range of parameters. The inclusion of the width explains the finite radiation resistance observed at lower cutoff frequency of the surface wave.

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